https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14006315Edit ImageSaveSaveEditCropCustom TextWomen grind glass lenses while two customers try spectacles on. Coloured line engraving, 1799.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 791 px | 300 dpiLarge JPEG 1686 x 1112 px | 300 dpiFree DownloadWomen grind glass lenses while two customers try spectacles on. Coloured line engraving, 1799.More